<h2>DESCRIPTION</h2>

<em>t.rast3d.algebra</em> performs temporal and spatial map algebra 
operations on space time 3D raster datasets (STR3DS) by using the 
temporal 3D raster algebra.

<h3>NOTES</h3>

The module expects an <b>expression</b> as input parameter in the following form:
<p>
<tt>"result = expression"</tt>
<p>

The statement structure is exact the same as of <em>t.rast.algebra</em>,
see <a href="t.rast.algebra.html">t.rast.algebra</a> but allows four-dimensional
indexing.

<h2>SEE ALSO</h2>

<em>
<a href="t.rast.algebra.html">t.rast.algebra</a>
<a href="t.rast3d.mapcalc.html">t.rast3d.mapcalc</a>
<a href="r.mapcalc.html">r.mapcalc</a>
<a href="t.vect.algebra.html">t.vect.algebra</a>
<a href="t.select.html">t.select</a>
</em>

<h2>REFERENCES</h2>

<a href="http://www.dabeaz.com/ply/">PLY(Python-Lex-Yacc)</a>

<h2>AUTHORS</h2>

Thomas Leppelt, S&ouml;ren Gebbert, Th&uuml;nen Institute of Climate-Smart Agriculture

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